Submission #532799

#	Time	Username	Problem	Language	Result	Execution time	Memory
532799		sam571128	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	25 ms	8516 KiB

Main

#include <bits/stdc++.h>

#define int long long
#define fastio ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

using namespace std;

signed main(){
    fastio
    int n;
    cin >> n;
    int arr[n], diff[n], pref[n] = {}, suff[n+1] = {};
    for(auto &x : arr) cin >> x;
    for(int i = 1;i < n;i++){
        diff[i] = arr[i] - arr[i-1];
    }

    int ans = 1e18;

    for(int i = 1;i < n;i++){
        pref[i] = (pref[i-1] + (diff[i] < 1 ? 1-diff[i] : 0));
    }

    for(int i = n-1;i >= 0;i--){
        suff[i] = (suff[i+1] + (diff[i] > -1 ? diff[i]+1 : 0));
    }

    for(int i = 0;i < n;i++){
        ans = min(ans,max(pref[i],suff[i+1]));
    }

    cout << ans << "\n";


}

//-10 32 51 -81 87 -62 56

• Subtask 1: 40 / 40
• Subtask 2: 60 / 60